Title :
Progressive image transmission over OFDM systems using multiple antennas
Author :
Song, Jie ; Liu, K. J Ray
Author_Institution :
Dept. of Electr. & Comput. Eng., Maryland Univ., College Park, MD, USA
Abstract :
A joint source-channel coding (JSCC) scheme for SPIHT (set partitioning in hierarchical tree) coded image transmission over OFDM (orthogonal frequency division multiplexing) systems with spatial diversity is proposed where no feedback channel is available. By using diversity techniques, the fading effects can be dramatically decreased, and we show that subchannels in OFDM systems are indeed flat Rayleigh fading channels and approach Gaussian noisy channels when the diversity gain gets large; as a result, the system performance can be improved. Simulation results are presented with different numbers of antennas and different multi-path delays and Doppler spreads
Keywords :
AWGN channels; Doppler broadening; OFDM modulation; Rayleigh channels; antenna arrays; combined source-channel coding; delays; image coding; set theory; simulation; tree codes; visual communication; Doppler spread; Gaussian noisy channels; OFDM systems; SPIHT-coded image transmission; diversity gain; fading effects; feedback channels; flat Rayleigh fading channels; hierarchical tree; joint source-channel coding scheme; multi-path delay; multiple antennas; orthogonal frequency division multiplexing; progressive image transmission; set partitioning; simulation; spatial diversity; subchannels; system performance; tree coding; Delay; Diversity methods; Fading; Feedback; Gaussian noise; Image coding; Image communication; OFDM; Rayleigh channels; System performance;
Conference_Titel :
Multimedia and Expo, 2000. ICME 2000. 2000 IEEE International Conference on
Conference_Location :
New York, NY
Print_ISBN :
0-7803-6536-4
DOI :
10.1109/ICME.2000.871529
